One-Electron Atoms


A one electron atom is characterized as one electron combined with a nucleus. In the simple case, an example would be a hydrogen atom. One proton would be the nucleus and one electron would be paired with the proton. Another example would be a lithium ion. The nucleus would contain three protons and four neutrons (three neutrons if it was an isotope), but only one electron.


Hydrogen Atom
Lithium Ion
Energy to remove one electron
13.6 eV
124 eV
Energy to remove the second electron
n/a
1744 eV
Energy to remove the 3rd electron
n/a
2824eV